book Maths Puzzle Numerical Ability

How do I put {-8.4, -7.2, -6.0, -4.8} on a number line?

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book Other Question

Please show me how to simplify this:

2 + 1/x-5
__________
3- 2/x-5 What would you do to simplify a quadratic expression such as 5x^3-27x^2+58x+56?